3 Giraffes = 180 kg
1 Giraffe = 180 ÷ 3 = 60 kg
1 Giraffe + 1 Zebra = 140 kg
1 Zebra = 140 - 60 = 80 kg
1 Zebra + 2 Bears = 250 kg
2 Bears = 250 - 80 = 170 kg
1 Bear = 170 ÷ 2 = 85 kg
Therefore, the weight of 1 bear is 85 kg.
3 Giraffes = 180 kg
1 Giraffe = 180 ÷ 3 = 60 kg
1 Giraffe + 1 Zebra = 140 kg
1 Zebra = 140 - 60 = 80 kg
1 Zebra + 2 Bears = 250 kg
2 Bears = 250 - 80 = 170 kg
1 Bear = 170 ÷ 2 = 85 kg
Therefore, the weight of 1 bear is 85 kg.
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